[Glyph of Feral Spirit] has a sizeable benefit, but it is dependent on an ability with a long cooldown. The "benefit over time" is thus reduced significantly over other glyphs, but it does make for good burst dps.

While [Glyph of Lava Lash] is generally considered to be an overall weak glyph, it is based on a single enhancement melee dps talent, and so not dependent on having the correct weapon enhancement active, or having other synergistic talents.

[Glyph of Shocking] reduces Shock cooldowns by 1 second, equivalent to 16% more direct damage from shocks. The duration of shock debuffs is generally long enough that the reduced cooldown will be of limited benefit to the debuff. Enhancement shamans with this glyph will look longingly at the [Reverberation] talent in the Elemental tree.

[Glyph of Lava Lash] is not a viable choice for a PvP enhancement shaman, as the off-hand should almost always be enhanced with [Frostbrand Weapon]. Like in PvE, [Glyph of Shocking] is not a strong choice. However, in 3.1 it will allow for almost instant use of a [Stormstrike] following a shock spell, which would be a significant amount of burst damage.

[Glyph of Ghost Wolf] is not a very potent glyph, but could be considered a valid choice simply because it provides more PvP utility than many of the other minor glyphs.

Restoration Glyph Configurations

PvE

A restoration shaman has many viable glyph options, some focusing more on their mana regeneration and others to boost healing. Due to the amount of options, it's important to choose depending on the need of the shaman. If mana is more of a concern, glyphs like [Glyph of Water Mastery] and [Glyph of Mana Tide Totem] should be considered. [Glyph of Chain Heal] is one of the best glyphs for raiding as restoration, as chain heal is one of the restoration shaman's best tools for raid healing. [Glyph of Lesser Healing Wave] makes [Lesser Healing Wave] much more potent and mana efficient for healing tanks when no other restoration shaman is in the raid.

PvP

There is much to consider when choosing glyphs for PvP, and there is usually no single set that will work for every team's play style. In PvP restoration has a less than appealing line up of glyphs, which will improve in patch 3.1. [Glyph of Earthliving Weapon] is slightly more viable, as in PvP the shaman's attention is less focused on a single target, having earthliving proc more often means more passive healing to more players. [Glyph of Lesser Healing Wave] remains very viable, as putting [Earth Shield] on targets likely attacked by enemies makes them considerably easier to heal with [Lesser Healing Wave]. Choosing [Glyph of Healing Wave] makes healing easier in situations where you find yourself being targeted along with others (despite long-cast spells being unpopular in PvP, [Healing Wave] can be viable with enough haste rating, and when spec'd into [Tidal Waves]).

[Glyph of Water Mastery] isn't as potent, as it's more likely a restoration shaman will be using Earth Shield on himself rather than [Water Shield]. Also losing viability is [Glyph of Chain Heal], as there's generally less clumping of players in PvP environments. The exception to this being that if you managing to let others being attacked rather then you by hiding in the crowd you can have Earth shield on your allies while you have water shield on yourself, but if your not in a clump of players like you find in AV where you can stay hidden his statement would be true.